Weaknesses that led to the failure of the two banks are among the factors already considered in the agency's rating assessments for APAC banks, it said.

"We generally view securities portfolio valuation risks as manageable for APAC banks," Fitch said, adding that exposures tend to be the highest in India and Japan.

The collapse of Silicon Valley Bank has sparked a crisis of confidence in the banking sector, leading to a run on deposits at a host of regional banks despite U.S. authorities rolling out emergency measures to shore up confidence.

Earlier on Thursday, S&P said the fallout from Silicon Valley Bank's collapse may not lead to any rating actions on APAC banks as they are well placed to absorb potential contagion effects.

(Reporting by Shivani Tanna in Bengaluru; Editing by Rashmi Aich and Dhanya Ann Thoppil)